This logo will be used as part of a t-shirt design for a local information security conference. The conference is AppSec California, and is part of the Open Web Application Security Project (OWASP). It needs to include the name "AppSec California" and may include OWASP as well, if it fits well within the design. Also try to include 2019.
The design needs to work well on both a grey (or other neutral colored) t-shirt for attendees, and a brighter (historically orange, red, light pink) shirt for the staff. We can be somewhat flexible on the staff t-shirt color based on the design. In the past, designs that feature 1-4 colors have done well.
Please avoid cliché computer security designs, no big locks, etc. The conference takes place in southern California, so incorporating that into the design usually looks good. Here is our website: https://2019.appseccalifornia.org